Investment Securities (Narrative) (Details)	6 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) item	Dec. 31, 2021 USD ($) item
Investment Securities [Line Items]
Number of holdings greater than 10 percent of stockholders equity | item		0	0
Income tax expense (benefit) related to net realized gains (losses)	$ 187,000
Restricted investment securities		$ 387,200,000	$ 425,000,000.0
Allowance for credit losses		0	0
Fair Value		530,275,000	417,058,000
Unrealized Loss		63,145,000	8,898,000
State And Municipals [Member]
Investment Securities [Line Items]
Fair Value		177,284,000	18,429,000
Unrealized Loss		14,349,000	176,000
Pass-Through Mortgage Securities [Member]
Investment Securities [Line Items]
Fair Value		158,586,000	181,216,000
Unrealized Loss		25,184,000	4,591,000
Collateralized Mortgage Obligations [Member]
Investment Securities [Line Items]
Fair Value		84,527,000	99,305,000
Unrealized Loss		14,490,000	3,239,000
Corporate Bonds [Member]
Investment Securities [Line Items]
Fair Value		109,878,000	118,108,000
Unrealized Loss		$ 9,122,000	$ 892,000
Number of institutions | item		6